Answer:
For number 2 the answer is X=5,-2 
and for number 3 the answer is there is no solution 
 
        
             
        
        
        
Answer:
r=20
Step-by-step explanation:
take the number you have, divide it by the numerator, and multiply it by the denominator, like shown:
4/5 of a number (r) is 16
16/4=4
4*5=20
r=20
ta-da! :P
 
        
             
        
        
        
I think it’s C cause it’s never ending but not repeating at the same time